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Finding the Fourth Proportional to 2,759.88, 3,810.04 and 2,128.99

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Solution

The fourth proportional to 2,759.88, 3,810.04 and 2,128.99 is: 2,939.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,759.88 : 3,810.04 = 2,128.99 : x
  2. Step 2: Convert to fraction form
    2,759.88/3,810.04 = 2,128.99/x
  3. Step 3: Cross multiply
    2,759.88x = 3,810.04 × 2,128.99
  4. Step 4: Simplify right side
    2,759.88x = 8,111,527.53
  5. Step 5: Solve for x
    x = 8,111,527.53/2,759.88
  6. Step 6: Final answer
    x = 2,939.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.